Below is my curl request. I generated an API token from my account settings.
curl --request POST \
--user rahul.trehan@gliffy.com:<api_token> \
--header 'Accept: application/json' \
--header 'Content-Type: application/json' \
--data '
"string"' \
--url 'https://gliffy.atlassian.net/rest/api/2/licenseValidator'
Below is the error that I get when I do curl or use postman
<status>
<status-code>500</status-code>
<message>License validation is not supported in Cloud</message>
<stack-trace>java.lang.UnsupportedOperationException: License validation is not supported in Cloud
at com.atlassian.jira.bc.license.CloudLicenseService.validate(CloudLicenseService.java:54)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.atlassian.plugin.util.ContextClassLoaderSettingInvocationHandler.invoke(ContextClassLoaderSettingInvocationHandler.java:26)
at com.sun.proxy.$Proxy75.validate(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)